Concentration levels of major and trace elements in rice from sri lanka as determined by the k
0 standardization method |
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Authors: | R Jayasekera M C Freitas |
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Institution: | (1) Department of Botany, University of Kelaniya, Kelaniya, Sri Lanka;(2) Instituto Tecnológico e Nuclear (ITN), EN 10, P-2686-953 Sacavém, Portugal |
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Abstract: | Instrumental neutron activation (INAA) with k
0 standardization has been used to determine the concentration levels of a variety of major and trace elements (Al, As, Br,
Cd, Cl, Co, Cr, Cs, Cu, Fe, Hg, K, La, Mg, Mn, Mo, Na, Rb, Sc, Se, and Zn) in rice grains (raw and parboiled) and in rice
flour collected from local markets in Sri Lanka. In addition, the energy-dispersive X-ray fluorescence (EDXRF) analysis has
been used to determine the three elements Ca, P, and S in powdered samples. To evaluate and assure the accuracy and precision
of the k
0 standardization method, the IAEA standard reference material V-8 rye flour was analyzed. The results obtained in the present
investigation were compared with the results reported from other countries. All of the elements detected in the rice matrices
from Sri Lanka were very low in concentration or within normal limits for food plants. Approximate daily dietary intakes of
the individual elements supplied through rice were calculated and compared with the available literature values of daily allowances. |
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Keywords: | INAA k 0 standardization neutron activation analysis rice trace elements |
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